Climate Insights for Santiago

The climate in Santiago is temperate. The average annual temperature is 11°C and approximately 592mm of precipitation falls per year. June is the wettest month, receiving around 109mm of rainfall. Santiago is in the Southern Hemisphere. The seasons are reversed — summer runs from December to February, while winter falls between June and August. The summer months are: January, February, December. The coldest months are July, June, August, when temperatures can drop to -1°C. Snowfall occurs from April to October, with around 107cm accumulating over the season.

Temperatures in Santiago vary considerably across the year, with a 25°C difference between the coldest and warmest months. January is the warmest month, though highs remain moderate at 24°C with a mean of 18°C. The coldest month is July, when overnight lows fall to -1°C and the daily average is 4°C. On average, daily temperatures fluctuate by about 12°C between overnight lows and afternoon highs. The sharpest temperature change occurs between April and May, with a 5°C shift in average temperatures.

Santiago is a relatively dry area, receiving approximately 592mm of precipitation annually, which averages out to around 49mm per month. The wettest month is June, averaging 109mm of rainfall. August and July also tend to see above-average precipitation. The driest month is March, with just 7mm. That's 103mm less than June, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic. Snowfall is a regular feature from April to October, with around 107cm accumulating over the season. June typically sees the most snow at around 31cm.

Santiago is relatively calm, with an average annual wind speed of 9km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is January, averaging 11km/h, though still comfortable for most outdoor activities. The calmest conditions occur in May, with average winds dropping to 7km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 4km/h gap between the calmest and windiest months. Wind tends to pick up during the summer months. The seasonal averages are 7km/h in winter, 9km/h in spring, 10km/h in summer, 8km/h in autumn.

It is currently autumn in Santiago, which began on March 20, 2026. Santiago is in the Southern Hemisphere, where the seasons are reversed — spring starts in September, summer in December, autumn in March, and winter in June. The warmest period peaks in January at around 24°C, while the coldest stretch bottoms out in July near -1°C. Winter is next, beginning on June 21, 2026 — 90 days from now.

The best time to visit Santiago is during January, February, March and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 17°C with modest rainfall averaging 13mm per month. By contrast, July can be quite cold with temperatures dropping to -1°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Santiago based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.